If you cannot afford a chain breaker,
get a piece of 2x4 drill a hole into it the size of the pivot in the chain ... then lay the chain on top of it, make sure that the chain does not move, ... take a punch or a small screwdriver on top of the pivot and hit it with a hammer to punch the pivot out...
grab the pivot from the OTHER side with vicegrips or plyers.. pull firmly... but DO NOT bend the chain.
u will have to do this twice, in order to remove links....
make sure the the 2 ends match up... or u may have to do it a third time.